package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    //微信服务地址
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /*
    * 微信登录
    * @param userLoginDTO
    * @return
    * */
    public User wxLogin(UserLoginDTO userLoginDTO){
        //获取openid
        String openid = getOpenid(userLoginDTO.getCode());

        //调用微信的接口服务，获得当前微信用户的openid

        //判断openid是否为空，如果为空表示登录失败，抛出业务异常
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        //根据openid查询数据库中的用户
        User user = userMapper.getByOpenid(openid);
        //判断用户是否为空
        if(user==null){
            //如果为空表示当前用户为新用户，自动完成注册
            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            //将用户信息插入数据库
            userMapper.insert(user);
        }

        //如果是新用户自动完成注册

        //返回用户对象
        return  user;
    }
    /*
    * 获取openid
    * @param code
    * @return
    * */
    private String getOpenid(String code){
        // 测试模式：如果code是test123，直接返回测试openid
        if ("test123".equals(code)) {
            log.info("测试模式：使用测试openid");
            return "test_openid_123";
        }
        
        Map<String, String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = null;
        try {
            json = HttpClientUtil.doGet(WX_LOGIN, map);
        } catch (Exception e) {
            log.error("调用微信接口失败", e);
            return null;
        }
        if (json == null || json.trim().isEmpty()) {
            log.error("微信接口调用失败，返回为空");
            return null;
        }
        try {
            JSONObject jsonObject = JSONObject.parseObject(json);
            String openid = jsonObject.getString("openid");
            return openid;
        } catch (Exception e) {
            log.error("解析微信接口响应失败: {}", json, e);
            return null;
        }
    }
}